11From Benjamin Franklin to John Pringle, 1 December 1762 (Franklin Papers)
MS not found; reprinted from Benjamin Franklin, Experiments and Observations on Electricity...
12From Benjamin Franklin to John Pringle, 6 January 1758 (Franklin Papers)
MS not found; reprinted from Benjamin Franklin, Experiments and Observations on Electricity...
13From Benjamin Franklin to John Pringle, 21 December 1757 (Franklin Papers)
ALS : The Royal Society The following is what I can at present recollect, relating to the Effects...
14To Benjamin Franklin from John Pringle, [May? 1763] (Franklin Papers)
AL (incomplete and mutilated): American Philosophical Society [ Torn ] would take the liberty of...
15From Benjamin Franklin to John Pringle, 27 May 1762 (Franklin Papers)
ALS : Princeton University Library For nearly twenty years Franklin had been interested in the...